Information about rebuild transmission 4L80E/ 4L85E
There are some recommendations how to repair the automatic transmission 4L80E.
Transmission shift strategy is selected in such a way as to ensure the smoothest changing gear without the possibility of damage to the engine. For a basis of the development of the four-speed automatic gearbox 4L80E was taken a legendary three-speed automatic gearbox 3L80E, which operated for more than 20 years. Most of the details of these gearboxes are interchangeable, that allow you significantly to simplify the repair of the automatic gearbox 4L80E and it’s very good.
Transmission problems 4L80E/4L85E
The automatic gearbox 4L80E differs by the improved reliability and is able to operate under normal use for 30 or more years without repairs. From weak points it can be identified only damage of the clutch which at frequent throttling when moving from place can quickly go out of service.
How to repair 4L80E Transmission?
To repair the automatic gearbox 4L80E in this case does not represent any difficulty. The car owners only need to monitor the level of oil in the system, which is responsible for lubrication and cooling of moving parts. To change transmission oil is recommended every 100,000 kilometers. Thus, you can ensure maximum reliability when operating your car.
4L80E Teardown transmission video
4L80E Differences between early and late models
4L85E transmission fluid
Fluid capacity: 13.5 qts total capacity (may vary by application)
Original Dexron VI (For example Castrol Transmax Dexron VI)
TCI 4L80E/4L80E Deep Aluminum Pan — 278000
TCI 4L80E/4L80E Deep Aluminum Pan — 278010
ATI Performance Products — 703505
MOROSO Deep Sheet Metal Pan — 703525
B&M Racing Deep Aluminum Pan — 70295
4L85E transmission oil change